Structural and optical studies on thermal-annealed In2S3 films prepared by the chemical bath deposition technique
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- 作者：Sandoval-Paz ; M.G. ; Sotelo-Lerma ; M. ; Valenzuela-Já ; uregui ; J.J. ; Flores-Acosta ; M. ; et. al.
- 关键词：Indium sulfide ; Thermal annealing ; Thin films ; Structural transition ; Deposition process ; Optical properties ; Structural properties ; Chalcogens ; Chemical deposition ; Chalcogenides ; 81.16.Be ; 81.40.&minus ; z ; 78.66.Li
- 刊名：Thin Solid Films
- 出版年：2005
- 出版时间：January 24, 2005
- 年：2005
- 卷：472
- 期：1-2
- 页码：5-10
- 全文大小：601 K
文摘
Polycrystalline In2S3 films were grown on glass substrates by means of the chemical bath method and subsequently thermal-annealed in an Ar atmosphere at temperatures from 200 to 450 °C. The optical and structural properties of the films were studied as a function of the annealing temperature. The experimental results show that the as-deposited films are composed by a mixture of both cubic α and β crystalline phases, with some fraction of tetragonal phase. The thermal annealing on the films produces the conversion of the cubic crystalline phases to the tetragonal β one and a crystalline reorientation of the latter phase. Two energy band gaps were determined for all the films: one indirect and other direct at higher energy. The structural modifications of the films are accompanied by changes in the two energy band gaps of the films.